You can pick it up and move it
I believe that the answer is 12 because there is already 3 O molecules and since its in parentheses with 3 outside it that means that there are 3 of those CO molecules meaning that for every 1 CO there will be 3 O’s so 3, four times Is 12
Hmm... I'm unsure but its either B or D.
Hsuisiifi Sotheby’s udjhr